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<TITLE>80386 Programmer's Reference Manual -- Opcode STR</TITLE>
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<H1>STR -- Store Task Register</H1>

<PRE>
Opcode        Instruction   Clocks       Description

0F  00 /1     STR r/m16     pm=23/27     Load EA word into task register
</PRE>


<H2>Operation</H2>

<PRE>
r/m := task register;
</PRE>

<H2>Description</H2>

The contents of the task register are copied to the two-byte register or
memory location indicated by the effective address operand.
<P>
STR is used only in operating system software. It is not used in application
programs.

<H2>Flags Affected</H2>

None

<H2>Protected Mode Exceptions</H2>

#GP(0) if the result is in a nonwritable segment; #GP(0) for an illegal
memory operand effective address in the CS, DS, ES, FS, or GS segments;
#SS(0) for an illegal address in the SS segment; #PF(fault-code) for a page
fault

<H2>Real Address Mode Exceptions</H2>

Interrupt 6; STR is not recognized in Real Address Mode

<H2>Virtual 8086 Mode Exceptions</H2>

Same exceptions as in Real Address Mode

<H2>Notes</H2>

The operand-size attribute has no effect on this instruction.


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Chapter 17 -- 80386 Instruction Set</A><BR>
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